Apparatus for the treatment of stony or earthy materials.



HENRIK EiiltIL Bt'IsAGER, 0F COPENHAGEN, DENMARK.

APPARATUS FOR THE TREATMENT OF STONY OR EARTHY MATERIALS.

Specification of Letters Patent.

Patented. Sept. 7, 1909.

Application filed March 20, 1909. Serial No. 484,611.

To all whom it may concern:

lie it known that I, HENmK EMU. Rt'isaone. residing at Bredegade 5, Gopenhagen,F, in the Kingdom of Denmark, have invented certain new and useful Improvements in or Relating to Apparatus for the Treatment of Stony or Earthy Materials, of which the following is a specification, reference being had to the :u- -oinpa11 vingdrawings, forming a part hereof. 1

In the manufacture of cement the expense involved in the disintegration of the raw material considerably affects the cost of the final product. It is for this reason of great importance to efleet, at a minimum cost, the disintegration of the raw material until "the degree of fineness required for the calcining operation is obtained, or to effect the mixing of the raw materials in as fine a state of division as possible. This-object I attain according to this invention in making use of a wet treat ment, by preliminarily crushing the raw materials with an addition of a certain quantity of water with the aid of crushing mills, such as a ball mill, particularly of the kind in which not only the friction between the material and the balls, but also the pounding force of the latter is utilized, and by subsequently subjecting the crushed material in a sieve device, combined with a eentrifugally acting stirring device, to a separation so as to cause the finer particles in the form of slimes topass through the sieve, while the coarser particles are retained, and recharged into the ball mill. In preference to directly passing the slimes coming from the ball mill and separator, to a rotary kiln or the like, it is advisable to subject them to a further treatment in a roller mill, such as a tube mill or the like.

This latter method has proved to be particularly valuable, owing to the fact that a really economical working of the ball mill is obtainable only if the disintegrating opera tion in the mill is not continued to such an extent as to grind a. large proportion of the material t'lireetly to the required degree of fineness.

In order 5o carry out the present'invention, I therefore use by preferencea crushing plant.- wherein a sieve or separator, together with astirring device is so interposed between a ball mill and a tube mill, that the sieve is charged with the material crushed by the ball mill, and conveys the finer particles which pass through the meshes of the sieve in the form of slimes, tothe tube mill, while thecoarse particles are retained by the sieve and recharged into the ball mill.

In order to efiiciently separate the slimes from the coarser particles, it is preferable to equip the sieve separator on the one hand with hollow arms adapted to feed the material, and on the other. hand with flat wings for beating and whipping the material against the walls of the sieve. It is in this connection important that the extent of treat- -mcnt of the charge admitted to the sieve separator should be controllable at will. To this end the driving gear of the crushing and stirring device is capable of being so coupled with a discharging dcvice-for the treatment of the coarse material retained by the sieve, thatthe speed of the discharging device is adjustable to' any desired degree without, however, necessitating throwing the driving gear of the stirring machinery out of action.

The invention is illustrated by way of example in the accompanying drawings:

Figure 1 shows, diagrammatically, a crushing plant arranged according to this invention. Fig. 2 is a vertical axial section of the sieve separator. .Fig. 3 is a horizontal section on the line 3-3 of Fig. 2, and Fig. 4 is a horizontal section on the line 44 of Fi 2..

The ball mill 1 which is shown in side elevation may be of any known construction. 2 designates a sieve separator, also shown in side elevation, consisting of a strong stationary drum'and other devices for the separation of the coarse material from the finer particles in the form of slimes as they both come from the ball mill.

3 is a tube mill of any desired construction. The ball mill 1 is charged by a bucket elevator 4 or the like arranged to, discharge into the inlet hopper 5 of the ball mill 1. The outlet 6 of the latter is arranged opposite the inlet 7 of the sieve separator 2. The outlet 8 for the coarse material coming from the separator 2 is directly connected with the elevator device 4 by a conduit 9. The slimes separated in the sieve 2 from thecoarse material leave the sieve through a discharge outlet 10 communicating with a conduit 11. and through a. hollow trunnion 12 enter the rotary tube mill 3, at the other end of which they are discharged in a known manner through slots' or the like and delivered through a casing 13. Y

The construction of a special form of the separator 2, only diagrammaticall represented in Fig. 1, is more specifica lyillustrated in Figs. 2,3 and 4. In these figures, 14

designates the outer casing or drum, and 15 is the stationary sieve of the separator. The shaft- 16 of the stirring device is arranged centrally within the separator. The stirring device consists of hollow tubular arms 17 for feeding the material and of fiat wings 18, by which the material'on leaving the hollow arms 17 is whipped against the walls of the sieve. 19 is an incline within the casin over which the slimes, discharged through the meshes of the sieve 15, are conveyed to the outlet openin 20 of the separator. 21 designates an outlet opening for the coarse material retained during the separation within the sieve 15. Communicating with this outletis a casing 22 containing a feed screw or worm 23 adapted to convey the coarse material to the discharge 24. The

worm 23 is driven from the driving gear of the shaft 16 by a belt 26 (Fig. 3) running over the pulley of the worm 23 and driven by a shaft 27. The latter carries at one of its ends a friction disk. 28, engaging againsta friction collar 29 which is longitudinally movable on the shaft 30 which drives the shaft 16. The displacement of the member which carriesthe friction collar 29, on the shaft 30 is effected by an arm 31 arranged,

on a nut working on a screw 32 which is ad justable with the aid of a chain 33, operated at will by a hand wheel 35 is the feed hopper of the separator.

The operation of the described apparatus is as follows The slimy charge fed into the hopper 35, Fig. 2, passes downwardly therefrom through the passage shown which forms a common inlet openin for the rotating hollow arms 17, through sai arms and is discharged against the sieve 15, and in gliding down along the walls of the latter is constantly beaten and whipped against them. The fine slimes thus driven through the sieve pass along the incline 19 to the outlet opening 20. The coarse residue passes through the outlet opening 21 into the conveyer casin 22 and by the worm 23. is conveyed to the ischarge opening 24. The speed of the worm 23 is adjusted by turning the handwheel 34 according to the desired intensity of treatment of the material within the separator, and on the resence ofniore or less coarse material in t e char under-treatment. The rotation ofthe and wheel 34 causes a corresponding rotation of. the screw 32, producing a lateral displacement of the nut and arm 31, and consequently of the friction collar 29, thereby varying the distance between the collar 29 and the center 'of the friction disk 28 and consequently changing the drivingrspeed of the conveyer'23.

material over the surfaceof the sieve, several hollow arms 17 may be arranged at different heights, it being, however, always advisable to arrange with each such arm av second arm extending in opposite direction and located at the same height as that arm with which it is to form a pa r. By arranging these arms in pairs 21 better equilibrium is given to the moving masses.

Although' the plant above specified has been particularly described in connection -\vith the manufacture .of cement, it is obvious that it may, if desired, be used for other industries, such as for instance for the treatment. of gold ores or forv the disintegration of iron ores, and it is therefore to be under stood that the invention is not to be limited by the terms used in the above specification except as the state of art may require.

I claim as my invention:

1. In a device of theclass described, an external casing; a stationary sieve cylindrical in form within said casing; a rotary shaft; means for operating said shaft; a stirrin device within said sieve and secured to said shaft and having a plurality of hollow arms with a common inlet opening, said arms terminating adjacent said sieve whereby material passing through said arms is discharged against said sieve, said device being provided with a discharge passage leading from the space within said sieve and communicatin with said space by means of an outlet opening, and through which opening and passage coarse 'material is discharged; a crushing mill adapted to supply material to the inlet opening aforesaid; a conveyer for conveying the coarse material discharged from within said sieve to said crushing mill; said device being also" provided with a second discharge passage leading from the space between said s eve and sald external casmg and terminating in an outlet opening through which material passing through said sieve is discharged.

2. In a device of the class descrlbed, an external casing; a stationary sieve cylindrical in form within said casing; .a rotary shaft;

means for. operating said shaft; 21. stirrin device within said sieve and secured to sai shaft and having a plurality of hollow arms with a common 1nlet opening, said arms terminating adjacent said sieve whereby material passing through said arms is discharged against said sleve; a conduit leading from within said sieve through which coarse material is discharged; 2. conveyer within saidconduit and operated from said rotary shaft; means for varying the speed at which said conveyer is operated; a crushing mill adapted to supply material to the inlet open ing aforesaid; a second conveyer for conveying the Course material discharged from within said sieve by said first mentioned conor the sake. of a better distribution of the veyer to said crushing mill; said device beassess ing provided with a discharge passage lead-- ingsfrom the space between said sieve and said external casing and terminating in an outlet opening through which material passing throu h the sieve is discharged.

3. In a evice of the class described, an external casing; a vertically arranged stationury sieve cylindrical in form within said casing; a vertically extending rotary shaft;

means for operating said shaft; a stirringsieve \\'ll(5l0l) the material passing through v said arms isdischarged against said sieve;

said device being pro ided with a discharge passage leading from the space within said sieve and communicating with said space by means of an outlet opening, and through which opening and passage, coarse material is discharged, and being also provided with a second dischargepassage leading from the space between sieve'and said externall casing and terminating in an outlet opening through which. material passing through said sieve is discharged. a

4-. In a device of the class described, an external casing; a vertically arranged stationarysieve cylindrical inform within said casing; a'vertically extending rotary shaft;

means for "operating said shaft; a stirring,

{ device within said sieve and secured to the Corrcti in in Letters Patent No.t933,669.;

upper end of said shaft. andhaving a plurality of hollow arms with a common inlet opening, and separate utlet openings, and

having also a-plurality of wings located below said hollow arnis. said armsterminating ad acentsaids eve whereby the material 'passiiig through said arms is discharged against said sieve; said'device being provided with a discharge passage leading from may conform thereto.

[sun] Signed and sealedthis 20th day of February, A. D., 1912,

the space within said sieve and communicating with said space by means of an outlet opening, and through which openin and passage course material is discharge and eing also provided with a second i" urge passage leading from the space between said sieve and said external casing and terminating in an outlet opening through which material (passing through said sieve is discharge 5. In a device of the 'classdescribed, an external casing; avertically arranged stationary sieve cylindrical in form within said casing; a vertically extending rotary shaft; means for operating said s'haft; a stirring device within said sieve ,and secured to the 7 upper end of said shaft and having a plurality of hollow arms with a. common inlet opening, and separate'outlet openings, and having also a pluralityof wings located below said hollow arms, said arms and said win 5 terminating adjacent said sieve whereby t ie 'inateri.al passing through said arms is discharged against sai sieve; said device being provided with a discharge passage leading from the space within said sieve and communication with said space by means of an outlet opening, and through which open-' iiig and passa e coarse material is dis charged, and. a so provided with a, second discharge passage leading from the space between said sieve and said external casing and terminating in an outlet opening located be-.

low said sieve throughwhich material pass-- ing through said sieve is discharged, the wall. of said second discharge passage being inclined downward so as to dlrect the material passing through said sieve toward said discharge opening.

This specification signed andwitnessed this fifth day of March, A. 1)., 1909.. I HENRIKIJMIL RilSAGER.

Signed in the presence of CIIR ENGELHART, ELLIA J. KRUGER.

Aflidavit having been filed showing that the name of the patentee in Letters Patent No. 933,669, granted September 7, 1909, for an improvement in Apparatus for; the Treatment of Stony or Earthy Materials, should have been written and printed I Henrik Riz'sager instead o f""Henrik Emil Riisager; that the proper correction been made in the and records pertaining to the cm in the Patent Oflice, and-should be read inns said Letters Patent am the same it is hereby certified I o. c. BILLING-S,

oflbmta.

assess ing provided with a discharge passage lead-- ingsfrom the space between said sieve and said external casing and terminating in an outlet opening through which material passing throu h the sieve is discharged.

3. In a evice of the class described, an external casing; a vertically arranged stationury sieve cylindrical in form within said casing; a vertically extending rotary shaft;

means for operating said shaft; a stirringsieve \\'ll(5l0l) the material passing through v said arms isdischarged against said sieve;

said device being pro ided with a discharge passage leading from the space within said sieve and communicating with said space by means of an outlet opening, and through which opening and passage, coarse material is discharged, and being also provided with a second dischargepassage leading from the space between sieve'and said externall casing and terminating in an outlet opening through which. material passing through said sieve is discharged. a

4-. In a device of the class described, an external casing; a vertically arranged stationarysieve cylindrical inform within said casing; a'vertically extending rotary shaft;

means for "operating said shaft; a stirring,

{ device within said sieve and secured to the Corrcti in in Letters Patent No.t933,669.;

upper end of said shaft. andhaving a plurality of hollow arms with a common inlet opening, and separate utlet openings, and

having also a-plurality of wings located below said hollow arnis. said armsterminating ad acentsaids eve whereby the material 'passiiig through said arms is discharged against said sieve; said'device being provided with a discharge passage leading from may conform thereto.

[sun] Signed and sealedthis 20th day of February, A. D., 1912,

the space within said sieve and communicating with said space by means of an outlet opening, and through which openin and passage course material is discharge and eing also provided with a second i" urge passage leading from the space between said sieve and said external casing and terminating in an outlet opening through which material (passing through said sieve is discharge 5. In a device of the 'classdescribed, an external casing; avertically arranged stationary sieve cylindrical in form within said casing; a vertically extending rotary shaft; means for operating said s'haft; a stirring device within said sieve ,and secured to the 7 upper end of said shaft and having a plurality of hollow arms with a. common inlet opening, and separate'outlet openings, and having also a pluralityof wings located below said hollow arms, said arms and said win 5 terminating adjacent said sieve whereby t ie 'inateri.al passing through said arms is discharged against sai sieve; said device being provided with a discharge passage leading from the space within said sieve and communication with said space by means of an outlet opening, and through which open-' iiig and passa e coarse material is dis charged, and. a so provided with a, second discharge passage leading from the space between said sieve and said external casing and terminating in an outlet opening located be-.

low said sieve throughwhich material pass-- ing through said sieve is discharged, the wall. of said second discharge passage being inclined downward so as to dlrect the material passing through said sieve toward said discharge opening.

This specification signed andwitnessed this fifth day of March, A. 1)., 1909.. I HENRIKIJMIL RilSAGER.

Signed in the presence of CIIR ENGELHART, ELLIA J. KRUGER.

Aflidavit having been filed showing that the name of the patentee in Letters Patent No. 933,669, granted September 7, 1909, for an improvement in Apparatus for; the Treatment of Stony or Earthy Materials, should have been written and printed I Henrik Riz'sager instead o f""Henrik Emil Riisager; that the proper correction been made in the and records pertaining to the cm in the Patent Oflice, and-should be read inns said Letters Patent am the same it is hereby certified I o. c. BILLING-S,

oflbmta.

N0. 933,669, granted September 7, 1909, for an improvement in Apparatus for the Treatment of Stony or Earthy Materials, should have been written and printed Hem'ik lm'l Riz'aager instead of Henrik Emil Rfisager; it is hereby certified that the proper cqrreetion has been made in the files and records pertaining o the may conform thereto.

Signed and sealed this 20th day of February, A. D., 1912.

m-1 c. c. BILLINGS,

' Acting bmm m'omr ofPatmta.

Correction In Letters Patent No. 933,669. 

